Explain data structure fundamentals

Q: Explain data structure fundamentals

This is a Coding & Algorithms interview question from Citi for Software Engineer roles. View the full question and solution on PracHub.

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Question

Explain how a hash map works internally: hashing, collision resolution strategies (separate chaining vs. open addressing), load factor, and resizing. Provide average‑ and worst‑case time complexities for search, insert, and delete. Contrast arrays and linked lists for random access and insertion; give typical use cases for a stack versus a queue and their time complexities.

Explain data structure fundamentals

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